They provide elastic rebound of the arterial wall to help smooth out blood flow.
Answer: a cell membrane
Explanation: But remember that bacteria do have their DNA inside their protein envelope. They don’t have a nucleus, but they do have DNA making them also have the ability to reproduce.
The answer is : D. Certain vitamins might not be synthesized and foods might not break down as well. Antibiotics are taken during sickness to destroy the bacteria that caused an infection. More than often,they also kill the "good" bacteria in the large intestine, causing problems like diarrhea and upset stomach.
